Fuel-feed device for explosive-engines.



, No. 68l,267. Patented Aug. 27, I901.

A. SAUREB. FUEL FEED DEVICE FOR EXPLOSIVE ENGINES.

(Application filed In. 24, 1900-) v (No Model.) 3 Sheets-Sheet I.

A. SAUREB. FUEL FEED DEVICE FOR EXPLOSIVE ENGINES.

Patented Aug. 27, IQQI.

(Application filed Jan. 24, 1900.)

3 Sheets-Sheet 2.

(No-Modal.)

kueniar;

No. 68l,267. atented Aug; 21, I901.

- A. SAURER.

FUEL FEED DEVICE FOR EXPLOSIVE ENGINES.

(Application filed Jan. 24, 1900.)

(lo I I-J 3 Sheats-Shaet 3.

,Ve'zwu'w': fnverzizm' WW i v m nonms PETERS c0.. mTalm-(o wuumamu. n, c.

. U NITED STATES .ATENT met,

ADOLPH SAURER, OF ARBON, SWITZERLAND.

FUEL-FEED DEVICE FOR EX PLOSIVE-ENGINES.

SPECIFICATION forming part of Letters Patent N 0. 681,267, dated August 2'7, 1901.

Application filed January 24, 1900- Eerial No. 2,679. (No model.)

To all .llJh/Om it may concern:

Be it known that I, ADOLPH SAUBER, a citizen of the Republic of Switzerland, residing at Arbon, Switzerland, have invented new, and useful Improvements in Apparatus for Distributing Liquid Hydrocarbons in Motive:

Power Engines, (for which I have filed patents in Switzerland on the 29th of November,

1899, Serial No. 22,648; in France onthe 5th of December, 1899, Serial No. 283,098; in Germany on the 6th of December, 1899, not yet numbered, and in Great Britain on the 14th of December, 1899, No. 24,897,) of which the following is a specification.

In motive-power engines working with liquid hydrocarbons the liquid combustible is often pumped into the engine by means of a special pump, which receives its motion from the controlling mechanism that operates the air suction valve. This construction possesses the disadvantages that the supply of combustible to the enginedoes not occu r at the rightmoment and that the period of operation of the pump during one revolution of the engine is limited to that of the air-suction valve. Now distributing mechanism according to this invention has for its object to obviate these disadvantages by operating the pump and the suction-valve by separate sets of controlling mechanism, each of which can then be made as desired of any suitable form for attaining the object in view.

The accompanying drawings represent an example of apparatus according to this invention.

Figure 1 is an elevation of the distributing mechanism. Fig. 2 is a sectional 'plan there- Fig. 3 is a sectional end elevation corresponding to Fig. 1. Fig. 4 is a cross-section corresponding to the line A A of Fig. 2. Fig. 5 is a cross-section corresponding to the line B B of Fig. 2, and Figs. 6 and 7 are detail elevations and plan views of the stirruplever and governor with their connections.

1 denotes the controlling-shaft, from which the suction andeXhaust-valves as well as the pump for the liquid combustible receive their motion.

The former of these two valves has an oppositely-extending second arm 12, which carries at its outer end an abutment 9, against which bears a second abutment 13. The abutment 13 is on the end of a lever 14, whose upper forked end embraces a roller 15, which bears. against a cam 3, mounted on the controlling-shaft 1. The axle of the roller 15 is journaled in the forked end of another lever 16, which is pivoted on a bracket 18, secured to the bracket 17, that supports the controlling-shaft 1.

The exhaust-valve, the seat of which is in a casing 19, is acted upon by a double lever 20, which is mounted on a shaft 21 and carries at its outer end a roller 23. This roller bears upon the periphery of a cam 4, mounted on the controlling-shaft 1, on which there is also mounted a third cam 5 for actuating the eral arms 48, connected at their outer ends to links 49, which engage at their other ends a cross-head on the pistonrod of the pump 24.

The shaft 21 has prolongations extending on both sides of the webs 32 of the bracket which supports it, and the ends of these prolongations carry arms 33,which are connected to the levers 28 and 14, respectively, by rods 34. By means of toothed wheels 36 and 37 the motion of the controlling-shaft 1 can be transmitted to a shaft 35, which carries the governor 38. The sleeve of the governor acts upon a forked lever 39 on the upper end of a vertical shaft 40, that is in the bracket 26 and carries at its lower end a horizontal arm 41, which is connected to a stirrup-shaped lever 43 by a link 42. The cross-piece of this stirrup-lever 43, embracing the lever 20, is provided with an abutment 45, which is located directly over a stepped projection 44 on the lever 20.

In an engine working with a four-stroke cycle the mode of operation of the controlling mechanism hereinbefore described is as follows: The controlling-shaft 1, operated from a suitable moving part of the engine, is so connected as to make one revolution while the crank-shaft of the engine is making two revolutions, the piston during this time making four strokes. On the first stroke of the piston the suction or inlet valve is opened by reason of the controlling-shaft 1 making a quarter-revolution and rotating in the direction of the arrow, causing the cam 3, which is at the beginning of the suction, to ride over the roller 15, depress the tappet or lever 14, resting on complementary tappet 9 on lever 8, and move the opposite end of this lever 8 and connecting-rod 7 up to actuate lever 6 and open the inlet-valve in casing 2 to take gas. This quarter-turn of the controllingshaft 1 will at the same time cause about one-third of the eccentric surface of cam 5 to travel over the roller 25 and by the connecting mechanism partially force the piston of the pump 24 down, the returning stroke of the motor-piston forcing the pump-piston down to its full extent to pump hydrocarbon to the vaporizer and compressing the charge of gas in the cylinder. Ignition or explosion then takes place and the piston makes another stroke, and on its return the cam 4 comes into operation to depress lever 20 to open the exhaust-valve in casing 19, the pump remaining inoperative during this pistonstroke. This lever 20 carries near its forward end the projection or stepped tappet 44, which by reason of the movable abutment 45 can hold this lever 20 somewhat out of engagement with its cam 4, that is partially depressed to prevent the complete closure of the exhaust-valve. The extent of this opening due to the relative positions of the parts 44 and 45 is controlled by a governor driven from the controlling-shaft 1 by means of a gear 36, which gears with and drives a pinion 37 on a horizontal shaft 35. The shaft 35 carries at its end a ball-governor, whose weighted arms are held together by a spring 38. These arms are suitably pivoted and arranged to move a spool axially on the shaft 35. This spool is embraced by a forked lever 39 on a vertical shaft 40, to which is secured an arm 41, the three parts combining to form and act like a bell-crank lever. The end of the arm 41 has a ball-and-socket connection with a rod 42, connected to the stirruplever 43, that is suitably pivoted, straddles the lever 20, and carries the displaceable tappet 45, whereby this tappet is positioned by the governor and controls the closing of the exhaust-valve. The lever 20 has projecting hubs or shafts 21, on the end of each of which is secured a crank-arm 33, connected to the tappet-levers 14 and 28, whereby the tappets 13 and 29 are thrown out of line with their cooperating tappets 9 and 30, and the parts to which these latter tappets are connected then remain idle and the inlet-valve and pump inoperative.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

a cam-shaft driven from a moving part, cams thereon to actuate each lever, tappets interposed between the cams and the levers that actuate the pump and the inlet-valve, a governor suitably driven, mechanism connected therewith to control the extent of closing of the exhaust-valve and mechanism to cause the tappets to remain idle, substantially as described.

2. In a gas-engine, the combination with the cylinder its inlet and exhaust valves, a pump for hydrocarbon and a separate lever to operate each of said valves and the pump, of a cam-shaft driven from a moving part, cams thereon to actuate each lever, swinging tappets interposed between the ends of the levers that actuate the pump and inlet-valve and their actuating-cams, a governor driven from said cam-shaft, mechanism connected thereto to prevent closure of the exhaustvalve and simultaneously to swing the tappets to cause them to run idle, substantially as described.

3. In a gas-engine, the combination with the cylinder its inlet and exhaust valves, a pump for hydrocarbon and a separate lever to operate each of said valves and the pump, of a cam-shaft driven from a moving part, cams thereon to actuate each of said levers, depending pivoted tappets between the ends of the levers that actuate the pump and inlet valv'e, and their actuating=cams; a governor driven from the cam-shaft and arranged to control the movement of the lever control ling the exhaust-valve, and devices connected with said lever and the tappets arranged to move them out of engagement with the ends of the levers when acted upon by their respective cams, substantially as described.

4. In a gas-engine,- the combination with the exhaust-valve, its operating-lever and a stepped tappet thereon, of a cam for moving the lever, a yoke arranged to be moved into the path of the tappet, a cam-shaft, a governor driven therefrom, a bell-crank moved by the governor and connected to said yoke to move it into engagement with the stepped tappet, as set forth.

5. In a gas-engine, the combination with the cylinder, its inlet and exhaust valves and aseparate lever to operate each of said valves; of a cam-shaft, a pump for hydrocarbon and a lever to operate it, all of said levers actuated from the cam-shaft, and mechanism connected to and operated by the lever operating the exhaust-valve and arranged intermediate the cam-shaft and the inlet-valve and pump-actuating levers, to cause the latter to remain temporarily idle, substantially as set forth.

6. In a gas-engine, the combination with the cylinder, its inlet and exhaust valves, and a separate lever to operate each of said valves;

of a cam-shaft, a governor and shaft driven from the cam-shaft, a rock-shaft and a pump for hydrocarbon driven by the rock-shaft, a

operate the levers, a governor and its shaft geared to and driven from said cam-shaft, a bell-crank lever operated by the governor, a yoke connected to the bell-crank lever and. straddling the lever operating the exhaustvalve, and tappets on the lever and the yoke cooperating to control the closure of the ex haust-valve, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ADOLPH SAURER;

Witnesses:

MORITZ VEITH, A. LIEBERKNECHT. 

